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| tpi421vett | First driving impressions 450CI/ AFR 235/MamoRam(miniram) | ||
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Well I have the tuning really dialed in on the new combo. 450CI, the new AFR 235's and a reworked Miniram by Tony Mamo (MamoRam) 11.6 compression, Crane 252/260 solid roller. The Miniram now flows 410cfm, and the heads flow over 335cfm. But I gained 500-600 more rpm with the same cam, it has better throttle response, and the part throttle torque is amazing. It reminds me of some of the 421's I have done with the AFR195 heads on the bottom end. But you can tell it has a big flowing head on the top end. Basically this thing gained power everywhere. I didn't have to give up bottom end power to get the gains on the top end that it ended up with. I used to shift about 5800-5900 rpm. I now shift at 6400-6500 rpm. And today I tried it on the bottle. It's a 200 shot of NOS. I went thru 3 gears, and you really can't even put words on how it felt. Like getting your head ripped off! This thing accelerates like never before! The first words out of my mouth after trying it on NOS was HOLY @%&#!
I will be running at the track on Friday, but it's suppose to be in the 90's here. So the DA will more than likely be over 8000ft. So we will see what happens! |
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Posted on: 2009/8/27 4:11
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AFR Dealer, can sell at prices too low to advertise. 801-953-6391 08 C6 LS3,3LT,Z51,A6,NPP 91 vette,450ci, AFR 220, miniram,FAST, Crane 252/260 solid roller, 200 shot nos, ZF6, 4 link, 9", DA corrected to 1300 ft 9.65@145.xx 450ci now with AFR 235... |
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| Calm | Re: First driving impressions 450CI/ AFR 235/MamoRam(miniram) | ||
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Posted on: 2009/8/27 4:49
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| bogus | Re: First driving impressions 450CI/ AFR 235/MamoRam(miniram) | ||
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When is the next trip to the dyno??? That monster must be over 800 hp with NOS!
Now... take it to Pinks all out!!! ) |
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Posted on: 2009/8/27 6:42
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The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me |
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| Matatk | Re: First driving impressions 450CI/ AFR 235/MamoRam(miniram) | ||
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How do you pronounce @%&#!? Is that a french word?
I'm glad the tune and everything are tweaked! Do you think the big shot of NOS is going to cause any issues (eg, like Dan faced with melting the plugs)? Any estimates on HP/TQ? Matthew |
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Posted on: 2009/8/27 16:49
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2002 EBM convertible, Magnusson supercharger, cam, headers, etc. 1989 Corvette...RIP |
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| tpi421vett | Re: First driving impressions 450CI/ AFR 235/MamoRam(miniram) | ||
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@%&#! translates to a certain word in English!
I have run over 100 botttles thru my car, and never hurt anything. The key is pull timing and have plenty of fuel available. I haven't dynoed my car in a while. And now there are no Dynojets in Salt Lake City, so it would be on a Mustang dyno. So it wouldn't be a apples to apples comparison. But I wouldn't be surprised to see it over 800rwhp on the bottle. I forgot to mention for people who didn't know the old combo I was running. I had the old AFR220 comp port heads ported by Lloyd Elliot, and miniram ported by Jeb Burnett. Both flowed around 310cfm. |
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Posted on: 2009/8/27 17:26
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AFR Dealer, can sell at prices too low to advertise. 801-953-6391 08 C6 LS3,3LT,Z51,A6,NPP 91 vette,450ci, AFR 220, miniram,FAST, Crane 252/260 solid roller, 200 shot nos, ZF6, 4 link, 9", DA corrected to 1300 ft 9.65@145.xx 450ci now with AFR 235... |
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| BrianCunningham | Re: First driving impressions 450CI/ AFR 235/MamoRam(miniram) | ||
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look forward to you times
way to go!  |
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Posted on: 2009/8/27 17:49
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Polo Green 95 LT1 6-spd http://mysite.verizon.net/vzevcp74/ 383 LT1/Vortech Supercharger/AFR heads/Rod end suspension/Penske-Hardbar dual rate coilovers/Wilwood 6pot brakes NCCC Governor: http://BayStateCorvetteClub.com |
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| dan0617 | Re: First driving impressions 450CI/ AFR 235/MamoRam(miniram) | ||
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That thing sounds badass. Can't wait to see your track times!
How cold of plugs do you run? And what AFR on the wideband do you run when spraying, or do you just go with plug readings when spraying? My problem was finding plugs cold enough to not melt down when spraying a 250 shot, but hot enough to not carbon foul when driving all day at light load part throttle on the highway. Also that a wideband reading of 11.5 or 11.7 works for an out of the box 125 or 150 shot, but is too lean on a motor that is getting well over 1/3 of it's power from the spray. I've found that Autolite AR3933's are working great for me. AR3932's carbon up, and AR3934's blister a little on a 250 shot. Have to keep the tune a little on the lean side at part throttle to keep the plugs new looking, then on the rich side on nitrous for safety. On the wideband it is reading high 9's and low 10's, but the plugs look great after a nitrous run. I thought the wideband was not reading right on the spray but I found a calculator on a nitrous forum that you basically need to figure how much power is from motor and how much is from spray, then figure your motor power at 12.7:1 afr and your spray power at 6:1 afr. Mine works out to low 10's, which is right where I need to be for good looking plugs. I now believe the wideband is right but the target afr does need calculated this way because when it is calibrated it is done in fresh air, not a mix of fresh air and nitrous. Works for me, I was just wondering if you have a wideband and what it reads when you are spraying the 200. Also, how is the part throttle light load cruise driveability and street manners when the converter is locked? That is alot of cam, heads, and intake for sure, but you do have alot of cubes to eat it up. |
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Posted on: 2009/8/28 12:47
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´89 Vert, 383, 230/236 cam, AFR 195's, LT Headers, HSR intake, 2800 stall, Zex 200 shot, ET Street Radials, tune by me. Runs were with D36 3.07's. On spray, 10.55 @ 132.78, 1.55 60 ft. On motor, 12.08 @ 113.15, 1.66 60 ft. |
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| 88BlackZ51 | Re: First driving impressions 450CI/ AFR 235/MamoRam(miniram) | ||
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Dan he is running a manual tranny. It's a sports car, lol!
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Posted on: 2009/8/28 14:40
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| dan0617 | Re: First driving impressions 450CI/ AFR 235/MamoRam(miniram) | ||
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So, all these years of squabbling with Josh (Neat) on all these forums, and as soon as I come by you take his side on bashing autos. Sheesh. J/K. Didn't realize he had a stick. |
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Posted on: 2009/8/28 21:30
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´89 Vert, 383, 230/236 cam, AFR 195's, LT Headers, HSR intake, 2800 stall, Zex 200 shot, ET Street Radials, tune by me. Runs were with D36 3.07's. On spray, 10.55 @ 132.78, 1.55 60 ft. On motor, 12.08 @ 113.15, 1.66 60 ft. |
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| 88BlackZ51 | Re: First driving impressions 450CI/ AFR 235/MamoRam(miniram) | ||
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Nah! I have really never been a big fan of auto's.... I don't really squable with Josh as he is a lightweight. So Jimmy. Did you trap in the 140's tonight? |
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Posted on: 2009/8/29 1:40
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| tpi421vett | Re: First driving impressions 450CI/ AFR 235/MamoRam(miniram) | ||
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Hi Dan, As mentioned I run a 6 speed. And thanks for the compliments. But believe me I know a auto set up with the right convertor, can kick azz at the track for drag racing. So I wouldn't consider myself a auto basher. I just like banging gears. Hell with a 4500-5000 stall, my car probaby would be faster. But I drive my car on the street. And a 5000 stall isn't very street friendly, where a manual is. I usually dial mine in around 11.8-12.1 or 12.2 on the bottle. My FAST system has it's own wideband. But my plugs look fine, and it doesn't hurt parts. As far as street manners... this thing is the best it's been since I had a 421 with 195 heads on it in my car. I have probably had 5 different engines in my car with several different configurations of those motors. It is crisp and the part throttle torque feels awesome. Oh... and I run a Autolite 3924 spark plug in my car. Jim |
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Posted on: 2009/8/31 2:05
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AFR Dealer, can sell at prices too low to advertise. 801-953-6391 08 C6 LS3,3LT,Z51,A6,NPP 91 vette,450ci, AFR 220, miniram,FAST, Crane 252/260 solid roller, 200 shot nos, ZF6, 4 link, 9", DA corrected to 1300 ft 9.65@145.xx 450ci now with AFR 235... |
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| tpi421vett | Re: First driving impressions 450CI/ AFR 235/MamoRam(miniram) | ||
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Well guys, I went to the track Friday night. I shouldn't have even gone. They said earlier in the week the temp would be upper 80's. Well it was 98 degrees. Normally over 90 degrees I stay home. And the DA was 8020ft. It was so hot nobody could hook very good. My 60ft's are usually 1.47-1.52. Last night it was 1.62-1.69. So all I could muster was 10.40's. The first run was so slick, I ran a 11.13. I blew the tires off the car about the whole run. And I haven't raced since Sept of last year, So I felt a little rusty. But even as bad as things were I still ran 2 mph faster than ever at half track 107.47 vs 105.xx. And did run 135.91, my best mph in horrible conditions. And usually to run 10.40's I have to have a 1.52 60ft. Now I did it with a 1.68 60 ft. And I was running a rich A/F 11.1-11.4 on NOS. So I need to make some tweaks, and make some more passes when it cools down. And where I am at to shave 2 tenths off probably takes 50-60hp. So even if I end up .2 faster, that is still a big gain for swapping heads. And with a 6 speed car, it's really up to the driver to make a good et. Launch rpm, shift points, shifting, ect. I said in the beginning, I would be happy to cut .2-.3 off my times. And I am pretty certain that will happen.
We will see what happens when it cools down. Once every several years(blue moon) we see DA UNDER 6000 ft... like 5600 ft. Those are rare true mineshaft conditions for us. But even 6500-7000 ft air is good. So I will let it cool down a bit and try it again. And hopefully get some better air that the car will actually hook. It usually hooks pretty good with the 4 link in it. Thanks Guys, Jim |
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Posted on: 2009/8/31 2:26
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AFR Dealer, can sell at prices too low to advertise. 801-953-6391 08 C6 LS3,3LT,Z51,A6,NPP 91 vette,450ci, AFR 220, miniram,FAST, Crane 252/260 solid roller, 200 shot nos, ZF6, 4 link, 9", DA corrected to 1300 ft 9.65@145.xx 450ci now with AFR 235... |
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| dan0617 | Re: First driving impressions 450CI/ AFR 235/MamoRam(miniram) | ||
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You need to drive down off that mountain and run mid 9's! You and CFI-EFI are in the same boat, there ain't no oxygen in the air up there. Seriously, I'd likely pass out if I had to walk 100 feet where you are.
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Posted on: 2009/9/1 1:36
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´89 Vert, 383, 230/236 cam, AFR 195's, LT Headers, HSR intake, 2800 stall, Zex 200 shot, ET Street Radials, tune by me. Runs were with D36 3.07's. On spray, 10.55 @ 132.78, 1.55 60 ft. On motor, 12.08 @ 113.15, 1.66 60 ft. |
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